The Sumitomo business was started in Kyoto, the historic capital city of Japan,
in 17th by Masatomo Sumitomo and Riemon Soga. Masatomo is regarded as the spiritual founder of the Sumitomo Group. They opened copper refining business and a copper workshop there. Based on long experiences of copper related products, the Sumitomo Copper Rolling Works was established to manufacture copper wires (bare wires), copper plates, and copper rods, which is the formation of the Sumitomo Electric Industries Ltd (SEI). Since then, SEI has developed many new technologies and products through innovative R&D activities based on Sumitomo Electric manufacturing technologies for electric wires and power cables. SEI continues to introduce a wide variety of products that fulfill the expectations of society, in five business fields: "Automotive," "Information & Communications," "Electronics," "Electric Wire & Cable, Energy," "Industrial Materials
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